Noman Liaquat wrote: > I want to replace string "hello" with "abcd" how i > could do with iptables mangle, patch-o-matic is > working fine Firstly, since kernel >= 2.6.14 you don't need the string match in pom-ng anymore. About your question: such kind of replacement that you want to do is evil. Think about a TCP connection, if you modify the size of the packet the sequence number will be corrupted. So, adding support for replacing a string with another string of the same size would be fine. Whatever else would be broken. -- Pablo